A 47-year-old woman with a history of rheumatic fever is examined by her physician. Physical examination is significant for a low-pitched, rumbling, diastolic murmur preceded by an opening snap. The affected valve can be best evaluated by auscultation at which of the following locations?
(A) left second intercostal space
(B) Left fifth intercostal space
(C) Left power sternal body border
(D) Right second intercostal space
(E) Right fifth intercostal space
Answer: (B) Left fifth intercostal space